我试图按照the official mongodb documentation在amazon ec2上安装mongodb。 我的亚马逊实例是ubuntu，但问题是每次都在mongodb-org-server上挂起安装过程。这是日志
> sudo apt-get install -y mongodb-org
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
mongodb-org-mongos mongodb-org-server mongodb-org-shell mongodb-org-tools
The following NEW packages will be installed:
mongodb-org mongodb-org-mongos mongodb-org-server mongodb-org-shell
mongodb-org-tools
0 upgraded, 5 newly installed, 0 to remove and 121 not upgraded.
Need to get 0 B/50.7 MB of archives.
After this operation, 157 MB of additional disk space will be used.
Selecting previously unselected package mongodb-org-shell.
(Reading database ... 70167 files and directories currently installed.)
Preparing to unpack .../mongodb-org-shell_3.0.6_amd64.deb ...
Unpacking mongodb-org-shell (3.0.6) ...
Selecting previously unselected package mongodb-org-server.
Preparing to unpack .../mongodb-org-server_3.0.6_amd64.deb ...
Unpacking mongodb-org-server (3.0.6) ...
Selecting previously unselected package mongodb-org-mongos.
Preparing to unpack .../mongodb-org-mongos_3.0.6_amd64.deb ...
Unpacking mongodb-org-mongos (3.0.6) ...
Selecting previously unselected package mongodb-org-tools.
Preparing to unpack .../mongodb-org-tools_3.0.6_amd64.deb ...
Unpacking mongodb-org-tools (3.0.6) ...
Selecting previously unselected package mongodb-org.
Preparing to unpack .../mongodb-org_3.0.6_amd64.deb ...
Unpacking mongodb-org (3.0.6) ...
Processing triggers for man-db (2.6.7.1-1ubuntu1) ...
Processing triggers for ureadahead (0.100.0-16) ...
Setting up mongodb-org-shell (3.0.6) ...
Setting up mongodb-org-server (3.0.6) ...